示例:WPF中TreeView自定义TreeNode泛型绑定对象

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一、目的：在开发中经常需要绑定TreeView，所以定义了一个泛型的TreeNode<T>用来方便绑定对象和复用

二、实现

    public partial class TreeNodeBase<T> : SelectBindable<T>, ITreeNode{public TreeNodeBase(T t) : base(t){}private ObservableCollection<TreeNodeBase<T>> _nodes = new ObservableCollection<TreeNodeBase<T>>();public ObservableCollection<TreeNodeBase<T>> Nodes{get { return _nodes; }set{_nodes = value;RaisePropertyChanged();}}}

三、环境

VS2022

四、示例

生成测试数据

    public class GetTestTreeNodes : MarkupExtension{public override object ProvideValue(IServiceProvider serviceProvider){var roots = this.GetTreeNodeBases().ToList();foreach (var item in roots){var n1 = this.GetTreeNodeBases();foreach (var item1 in n1){var n2 = this.GetTreeNodeBases();item1.Nodes = n2.ToObservable();}item.Nodes = n1.ToObservable();}return roots;}private IEnumerable<TreeNodeBase<Student>> GetTreeNodeBases(){int c = Random.Shared.Next(3, 15);for (int i = 0; i < c; i++){yield return new TreeNodeBase<Student>(Student.Random());}}}

其中TreeNode<T> 的T使用的测试Student，实际开发中可以使用任意需要的类型，这样在不需要额外定义树结构的情况下可以绑定到树节点上

Xaml中如下绑定

  <TreeView ItemsSource="{local:GetTestTreeNodes}"><TreeView.ItemTemplate><HierarchicalDataTemplate ItemsSource="{Binding Nodes}"><TextBlock VerticalAlignment="Center" Text="{Binding Model.Name}" /></HierarchicalDataTemplate></TreeView.ItemTemplate></TreeView>

显示效果如下